Consolidated Statements of Shareholders' Equity (USD $) In Thousands, unless otherwise specified	Total USD ($)	Voting And Non Voting Common Shares [Member]	Voting Common Stock [Member] USD ($)	Non-Voting Common Stock [Member] USD ($)	Additional Paid-In Capital [Member] USD ($)	Notes Receivable From Stock Option Exercises [Member] USD ($)	Accumulated Other Comprehensive Income (Loss) [Member] USD ($)	Appropriated (Deficit) Retained Earnings [Member] USD ($)	Retained Earnings [Member] USD ($)	Non Redeemable Non Controlling Interests [Member] USD ($)	Total Permanent Equity [Member] USD ($)	Redeemable Non Controlling Interests [Member] USD ($)
Beginning balance, at Oct. 31, 2011			$ 2	$ 450	$ 0	$ (4,441)	$ 1,340	$ (3,867)	$ 466,931	$ 889	$ 461,304	$ 100,824
Beginning balance, (shares) at Oct. 31, 2011		115,623
Net income	264,768							22,566	203,465	3,994	230,025	34,743
Other comprehensive loss	2,583						2,583				2,583
Dividends declared per share value									(88,948)		(88,948)
Issuance of Voting Common Stock (shares)		14
Issuance of Voting Common Stock					56						56
Issuance of Non-Voting Common Stock:
On exercise of stock options (shares)		3,208
On exercise of stock options				13	50,506	(535)					49,984
Under employee stock purchase plans (shares)		158
Under employee stock purchase plans				1	3,653						3,654
Under employee incentive plans (shares)		95
Under employee incentive plans					2,068						2,068
Under restricted stock plan, net of forfeitures (shares)		1,229
Under restricted stock plan, net of forfeitures				5							5
Stock-based compensation					56,027						56,027
Tax benefit of stock option exercises					8,618						8,618
Repurchase of Non-Voting Common Stock (shares)		(4,035)
Repurchase of Non-Voting Common Stock	106,470			(16)	(91,426)				(15,028)		(106,470)
Principal repayments on notes receivable from stock option exercises						821					821
Net subscriptions (redemptions/distributions) of non-controlling interest holders										(3,238)	(3,238)	45,250
Deconsolidation												(65,092)
Reclass to temporary equity										(132)	(132)	132
Purchase of non-controlling interests												(19,864)
Other changes in non-controlling interests					(2,772)						(2,772)	2,772
Ending balance, at Oct. 31, 2012			2	453	26,730	(4,155)	3,923	18,699	566,420	1,513	613,585	98,765
Ending balance, (shares) at Oct. 31, 2012		116,292
Net income	230,426							(8,450)	193,841	5,827	191,218	39,208
Other comprehensive loss	(4,100)						(4,100)				(4,100)
Dividends declared per share value									(218,740)		(218,740)
Issuance of Non-Voting Common Stock:
On exercise of stock options (shares)		5,687
On exercise of stock options				22	118,728	(5,102)					113,648
Under employee stock purchase plans (shares)		141
Under employee stock purchase plans				1	3,516						3,517
Under employee incentive plans (shares)		69
Under employee incentive plans					2,079						2,079
Under restricted stock plan, net of forfeitures (shares)		1,460
Under restricted stock plan, net of forfeitures				6							6
Stock-based compensation					59,285						59,285
Tax benefit of stock option exercises					20,584						20,584
Repurchase of Voting Common Stock (shares)		(14)
Repurchase of Voting Common Stock					(73)						(73)
Repurchase of Non-Voting Common Stock (shares)		(2,003)
Repurchase of Non-Voting Common Stock	73,941			(8)	(73,933)						(73,941)
Principal repayments on notes receivable from stock option exercises						2,135					2,135
Net subscriptions (redemptions/distributions) of non-controlling interest holders										(5,361)	(5,361)	62,338
Deconsolidation												(93,689)
Reclass to temporary equity					(27,444)					(224)	(27,668)	27,668
Purchase of non-controlling interests												(77,996)
Issuance of subsidiary equity												13,927
Other changes in non-controlling interests					(4,635)						(4,635)	4,635
Ending balance, at Oct. 31, 2013	671,539		2	474	124,837	(7,122)	(177)	10,249	541,521	1,755	671,539	74,856
Ending balance, (shares) at Oct. 31, 2013		121,632
Net income	321,164							(4,095)	304,316	6,228	306,449	14,715
Other comprehensive loss	(17,819)						(17,819)				(17,819)
Dividends declared per share value									(109,020)		(109,020)
Issuance of Voting Common Stock (shares)		30
Issuance of Voting Common Stock					162						162
Issuance of Non-Voting Common Stock:
On exercise of stock options (shares)	3,732	3,732
On exercise of stock options				14	84,704	(3,549)					81,169
Under employee stock purchase plans (shares)		110
Under employee stock purchase plans					3,709						3,709
Under employee incentive plans (shares)		99
Under employee incentive plans					3,353						3,353
Under restricted stock plan, net of forfeitures (shares)		1,176
Under restricted stock plan, net of forfeitures				5							5
Stock-based compensation					60,281						60,281
Tax benefit of stock option exercises					18,570						18,570
Repurchase of Voting Common Stock (shares)		(14)
Repurchase of Voting Common Stock					(77)						(77)
Repurchase of Non-Voting Common Stock (shares)		(8,504)
Repurchase of Non-Voting Common Stock	322,020			(33)	(266,561)				(55,426)		(322,020)
Principal repayments on notes receivable from stock option exercises						1,853					1,853
Net subscriptions (redemptions/distributions) of non-controlling interest holders										(5,326)	(5,326)	(376)
Deconsolidation								(3,687)			(3,687)	(4,111)
Reclass to temporary equity										(352)	(352)	352
Purchase of non-controlling interests												(19,213)
Issuance of subsidiary equity												9,935
Other changes in non-controlling interests					(28,978)				(2,330)		(31,308)	31,308
Ending balance, at Oct. 31, 2014	$ 657,481		$ 2	$ 460	$ 0	$ (8,818)	$ (17,996)	$ 2,467	$ 679,061	$ 2,305	$ 657,481	$ 107,466
Ending balance, (shares) at Oct. 31, 2014		118,261